body {
  background: darkgray;
}
.ul1 > li a:focus {
  background: #E7E7E7;
}
.jumbotron {
  background: url(../images/img/bg.jpg) no-repeat;
  background-size: 100% 100%;
  height: 192px;
  margin-top: 50px;
}
.content h3 {
  text-overflow: ellipsis;
  white-space: nowrap;
  overflow: hidden;
}
.bian {
  border-left: 4px solid darkgray;
  padding: 0 3px;
}
.zi p {
  color: lightgray;
}
